package com.cy.pj.sys.service.impl;

import java.util.List;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.thymeleaf.util.StringUtils;

import com.cy.pj.common.exception.ServiceException;
import com.cy.pj.common.vo.Node;
import com.cy.pj.sys.dao.SysMenuDao;
import com.cy.pj.sys.dao.SysRoleMenuDao;
import com.cy.pj.sys.entity.SysMenu;
import com.cy.pj.sys.service.SysMenuService;

@Service
public class SysMenuServiceImpl implements SysMenuService {
	@Autowired
	private SysRoleMenuDao sysRoleMenuDao;
	@Autowired
	private SysMenuDao sysMenuDao;
	
	@Override
	public List<Map<String, Object>> findObjects() {
		List<Map<String,Object>> list=
				sysMenuDao.findObjects();
		if(list==null || list.size()==0)
			throw new ServiceException("没有对应的菜单信息");
 		
		return list;
	}
		@Override
	public int deleteObject(Integer id) {
		//1.验证数据的合法性
		if(id==null || id<=0)
			throw new IllegalArgumentException("请先选则");
		//2.基于id进行子元素查询
		int count=sysMenuDao.getChildCount(id);
		if(count>0)
			throw new ServiceException("请先删除子菜单");
		//3.删除角色,菜单有关系的数据
		sysRoleMenuDao.deleteObjectsByMenuId(id);
		//4.删除菜单元素
		int rows=sysMenuDao.deleteObject(id);
		if(rows==0)
			throw new ServiceException("此菜单可能已经不存在");

		return rows;
	}
		@Override
		public List<Node> findZtreeMenuNodes() {
			
			return sysMenuDao.findZtreeMenuNodes();
		}
		@Override
		public int saveObject(SysMenu entity) {
			//1.合法验证
			if(entity==null)
			throw new ServiceException("保存对象不能为空");
			if(StringUtils.isEmpty(entity.getName()))
			throw new ServiceException("菜单名不能为空");
			int rows;
			//2.保存数据
			try{
			rows=sysMenuDao.insertObject(entity);
			}catch(Exception e){
			e.printStackTrace();
			throw new ServiceException("保存失败");
			}
			//3.返回数据
			return rows;

		}
		@Override
		public int updateObject(SysMenu entity) {
			//1.合法验证
			if(entity==null)
			throw new ServiceException("保存对象不能为空");
			if(StringUtils.isEmpty(entity.getName()))
			throw new ServiceException("菜单名不能为空");
			
			//2.更新数据
			int rows=sysMenuDao.UpdateObject(entity);
			if(rows==0)
			throw new ServiceException("记录可能已经不存在");
			//3.返回数据
			return rows;

		}
		

	
		
		
		

}
